<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <style>
    * {
        padding: 0px;
        margin: 0px;
    }
    .top {
        height: 80px;
        background-color: pink;   
    }
    .banner {
        width: 800px;
        height: 150px;
        background-color:white;
        margin: 0px auto;
    }
    .banner ul li {
        width: 192.5px;
        height: 150px;
        float: left;
        margin-right: 10px;
    }

    .one {
        background-color: skyblue;
    }
    .two {
        background-color: slateblue;
    }
    .three {
        background-color: pink;
    }
    .four {
        background-color: seagreen;
    }

    .main {
        width: 800px;
        height: 500px;
        background-color: skyblue;
        margin: 0px auto;
    }

    .left {
        width: 300px;
        height: 500px;
        background-color: yellow;
        float: left;
    }

    .right {
        width: 400px;
        height: 500px;
        background-color: red;
        float: right;
    }

    .bottom {
        background-color: black;
        height: 100px;
        width: 800px;
        margin: 0px auto;
    }

    .banner .four {
        margin-right: 0px;
        float: right;
    }
    </style>
</head>
<body>
    <div class="top"></div>
    <div class="banner">
        <ul>
            <li class="one">1</li>
            <li class="two">1</li>
            <li class="three">1</li>
            <li class="four">1</li>
        </ul>

    </div>
    <div class="main">

        <div class="left"></div>
        <div class="right"></div>
    </div>
    <div class="bottom"></div>
</body>
</html>